.demo02_background{
    background-color: #f5f5f5;
    height: 1000px;
    text-align: center;
    display: flex;
    justify-content: center;
}
.picture_background{
    background-color: #ffffff;
    height: 300px;
    width: 234px;
    text-align: center;
}
.picture{
    width: 160px;
    height: auto;
    margin:  auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}
.name{
    font-size: 14px;
    line-height: 25px;
}
.introduce{
    font-size: 12px;
    line-height: 30px;
    color: #cccccc;
}
.price{
    font-size: 14px;
    color: #ffa500;
}